Calling all experienced Bi-Ampers. I have a NAD C370 and a T752. I want to bi-amp and use the C370 as a power amp for front LF+ & LF-'s on three way floorstanders. The C370 has an input impedance of 50K, the T752 has an input impedance Z of 20k. Now when I bi-amp I would expect to have an input impedance (as seen by main pre outs on T752) of 14.28k (50k in parallel with 20k). I see no problem with the pre amp driving 14.28K but Will this impedance differential cause the bass or mid-tweeter section to be out of balance?? or louder etc???? The amplifiers both have similar voltage gains... Any advice would be apreciated.